Question

Consider the titration of a 25.0 mL sample of 0.170 molL−1 CH3NH2 (Kb=4.4×10−4) with 0.150 molL−1 HBr. Determine each quantity:

Part A

the volume of added acid required to reach the equivalence point

Part B

the pH at 6.0 mL of added acid

Express your answer using two decimal places.

Part C

the pH at the equivalence point

Express your answer using two decimal places.

Part D

the pH after adding 6.0 mL of acid beyond the equivalence point

Express your answer using two decimal places.